Machine for abrading and polishing floors.



P. KENBDBR.

MACHINE FOR ABRADING AND POLISHING moons. APPLICATION FILED SEI3T. 9,1914.

Patented Dec. 15, 1914.

Ta sr The W? 0F M NI s amen,

.ATE

FFII assIeNoB T0 Eugen ZENTZ, or MUNICH,

MM Y- MACHINE FOB n-pmnma app romsnnve FLOORS.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed September 9, 1914. Serial No. 860,839.

This invention relates to a machine for.

abrading and polishing floors after previous application of wax, so thatno hand labor is necessary except that required in guiding the machinewhich consists of a frame carrying a suitable electric motor, a slidingguide for the chip holder, a pulley with a hub for the polishing brush,which is arranged on a vertically rotary axis and devices to tension thedriving belts of the chip holder and the polishing brush.

The invention consists in the combination and arrangement of the partsof the machine as hereinafter described and shown in the accompanyingdrawings and specifically pointed out in the claims.

In the drawings, Figure 1 is a side view of the machine, Fig. 2 a bottomplan view. Fig. 3 is a transverse section on the line AB of Fig. 2. Fig.4 is a front view with the polishing brush in operative position.

The machine consists of a metal tube frame a which ispushed over thefloor by means of the wheels I) and the driving handle g-. The electricmotor (1, with the controller e and the switch f is arranged on thebridge piece 5.

The chip holder m and the rotary polishing brush l are placed on theunder side of the frame a near the front end and may be removed andreplaced one by the other.

For the reception of the chip holder m the frame a is provided with asliding guide n which is arranged on the longitudinal shanks of theframe. The rotary polishing brush 1 is either fixed on the hub of apulley 'v and with this arranged on a vertically rotary axis which isdirectly driven, or loosely set up on this axis and especially driven.In both cases the motion is efiected by wedge formed driving belts andpulleys from the axis is of the electric motor (1.

1n the drawings the axis In is provided with a double pulley o, thedriving belt 7) is led to a pulley 1' arranged near the rearward end ofthe frame a at the cross head a. The pulley 9* bears a crank-pin s andforms therefor a crank-disk which revolves Slower than the pulley 0. Onthe crankpin 8 is fixed the crank-rod t which is detachably connectedwith the chip holder m.

the pulley o a second driving belt u is led to a pulley v arranged nearthe forward end of the frame on a vertical axis which bears in the crosshead '9 The pulley w is nearly of the same diameter as the pulley o andlies between the brackets of the sliding guide n. The rotary brush-diskZ is detachably attached to the hub of the pulley 'v for instance bymeans of nuts or by bayonet-lock and key, as represented in thedrawings.

0 tension the driving belts 72 and u, the

cross heads (,1, may be slidably arranged on the frame a and the slidingguide it and provided with convenient span-devices. Such a span-deviceis shown in the drawings and consists of a screw bolt w at each end ofthe frame a and of a nut w in form of a sleeve which is rotatable in theframe a and may be turned by a squared stake-key. By revolving thesleeve-nut a: in one direction or the other the bridge pieces 9, q aremoved .away from or caused to approach the cross parts of the frame aand thereby the belts p and u loosened or tcnsioned.

If the machine is used to abrade the floor the chip holder m is inaction and the rotary brush Z removed. The electric motor at moves thechip holder m back and forth by means of the crank-rod t whereby thefloor is abraded in the direction of the planks. The rotation of thepulley r is much slower than that of the pulley 0 and therefore the chipholder m is slowly reciprocated, a great advantage for the abradingwork.

If the machine is used to polish the floor after waxing, the chip holderm and the crank rod t must be removed and the rotary brush inserted. Thelatter is rotated at a. very high speed, its rate of revolution beingnearly the same as that of the motor axis 7:, whereby the polishing isdone in a perfect manner.

During the abrading work the pulley 2) runs loosely, while during thepolishing work the pulley 1' runs loosely.

Having described my invention, what I bination of a frame,

- said cross heads,

claim as new and desire to secure by Letters Patent, is:

1. In a floor-surfacing machine, the comcross heads slidably carriednear opposite ends thereof, tool holders supported from said frame, amotor carried by said frame, pulleys carried by connections from saidmotor to said pulleys for driving the latter, connections from saidpulleys respectively to said tool holders, whereby one of the latter maybe reciprocated and the other thereof rotated, and means for moving saidcross. heads on said frame'to vary the tension of the connections fromthe motor to the pulleys.

2.- In a floor-surfacing machine, the combination of a frame, crossheads slidably carried near opposite ends thereof, a pulley carried byeach cross head, a motor carried by said frame, belts connecting theshaft of the motor with said pulleys, means for moving said cross headson said frame to vary the tension of said belts, a tool holder supportedby one of said pulleys and rotatable therewith, a second tool holdersupported from said frame, and a crank connection from the upper pulleyto said second tool holder whereby the latter is adapted to bereciprocated.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

PHILIP]? KENEDER.

W'itnesses D. H. ENGELKEN,

Guns.

